EXHIBIT 23

AMERICAN ELECTRIC POWER SYSTEM RETIREMENT SAVINGS PLAN

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-178044 of American Electric Power Company, Inc. on Form S-8 of our report dated June 25, 2015, relating to the financial statements and supplemental schedules of the American Electric Power System Retirement Savings Plan appearing in this Annual Report on Form 11-K of the American Electric Power System Retirement Savings Plan for the year ended December 31, 2014.

/s/Deloitte & Touche LLP

Columbus, Ohio

June 25, 2015

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